As far as I know Google doesn't offer a TURN server, which relays actual stream data. They do have a public STUN server which is free of charge. A STUN server doesn't relay data and thus doesn't work with 'minutes'. For a reliable call you do need a TURN server. You could look into XirSys where you only pay for …
telnet - How to determine if google public stun server is Actually, it is a good question, even though it's specific to Google. And a good answer will provide a way to test a STUN server in general. Moreover that STUN server is used in any WebRTC samples, demos, tutorials etc. I think people are too hasty in downvoting questions without REALLY understanding them and knowing what it's about. WebRTC in the real world: STUN, TURN and signaling - HTML5 Nov 04, 2013
Google Code Archive - Long-term storage for Google Code
Apr 03, 2017 What is a STUN Server and how does it work? The STUN server allows clients to find out their public address, the type of NAT they are behind and the Internet side port associated by the NAT with a particular local port. This information is used to set up UDP communication between the client and the VoIP provider to establish a call. The STUN protocol is defined in RFC 3489. Public STUN server list · GitHub
Firewall ports for the reverse proxy and TURN server
Apr 03, 2017 What is a STUN Server and how does it work? The STUN server allows clients to find out their public address, the type of NAT they are behind and the Internet side port associated by the NAT with a particular local port. This information is used to set up UDP communication between the client and the VoIP provider to establish a call. The STUN protocol is defined in RFC 3489. Public STUN server list · GitHub stun.1und1.de:3478 stun.gmx.net:3478 stun.l.google.com:19302 stun1.l.google.com:19302 stun2.l.google.com:19302 stun3.l.google.com:19302 stun4.l.google.com:19302 telnet - How to determine if google public stun server is